Hello!

Please, any good soul to help me with:

???

The result is :

Many thanks!!!

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- Jan 17th 2013, 09:43 AM #1

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- Jan 17th 2013, 10:42 AM #2

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## Re: \int

You left out the space between 'int' and 'x^2'. I added it.

Use "integration by parts": with , so that , . Doing that, you will still have an integral involving . So use integration by parts**again**, this time letting , .

Generally speaking, any time you have an integral of , you can consider repeated integration by parts, repeatedly taking the power of x as "u" so that when you differentiate to get du, you have one less power of x. Repeat until you have reduced the power of x to 0.

The result is :

Many thanks!!!